Nugget and Dog and everyone in Gastropolis are excited about Yum Fest. It's the coolest fair around, with fun food and sweet rides, like the Cherry-Go-Round and Relish Wheel. But this year, a unicorn-puppy tries to spoil all the fun. Can Nugget and Dog use K.E.T.C.H.U.P.--their club that spreads kindness, empathy, and more--to save the day?